For shooting in the rain, buy an underwater box, I did it, it's very cool. Any regular class 10 U3 memory card will do (No need to fork out for a V30 even for 4k60). With active use, you will have to buy the necessary fasteners - there is a large selection of them. I don’t really use microphones here, I have no complaints about the sound, it’s better here than on other action cameras, and in my opinion it’s no worse than from an iPhone. The battery pulls at least an hour 4k60, which is very good, but I would not refuse a replacement, although there has not yet been a real need. I barely used their application only after the purchase, later I stopped connecting an iPhone for shooting, because there was no need. Autofocus has been greatly improved by now (December 2022) to almost perfect, before AFC was terrible. But I still do not really understand the need for autofocus here at all. After continuous shooting 4k60, the device warms up decently from above, you can get burned, but it continues to shoot without problems.